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A method of promoting coal combustion

A technology of coal and combustion enhancer, which is applied in the field of combustion, can solve problems such as not being properly handled, and achieve the effects of promoting combustion efficiency, enhancing combustion efficiency, and reducing consumption

Active Publication Date: 2019-03-19
CHANGZHOU SOUTHEAST THERMAL POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the end of 2010, the national urban sewage treatment volume reached 34.3 billion cubic meters, and the dewatered sludge production was close to 22 million tons, and 80% of them were not properly treated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Add bamboo powder to the excess sludge according to the mass ratio of dry sludge to 30%, stir evenly and carry out plate and frame filter dehydration to reduce the water content of the sludge to about 50%, and then dry it with hot air to make the sludge containing The water volume drops to around 10%. The calorific value of the remaining sludge after well dehydration treatment increased to 8623kJ / kg, an increase of 34%.

[0015] (2) Add sodium carbonate and permethylferrocene in proportion to the excess sludge obtained by conditioning and drying, stir evenly, and then stand still for 6-8 hours to obtain a combustion accelerant. Wherein, the mass percentages of excess sludge, sodium carbonate and permethyl ferrocene are 30%, 30% and 40% respectively.

[0016] Adding 20kg of the above-mentioned combustion accelerant to every 1 ton of coal increases the temperature of the inner flame by 10%, and the Ringelmann blackness of the flue gas is less than 0.8.

Embodiment 2

[0018] (1) Add bamboo powder to the excess sludge according to the mass ratio of dry sludge to 60%, stir evenly and carry out plate and frame filter dehydration to reduce the water content of the sludge to about 50%, and then dry it with hot air to make the sludge containing The water volume drops to around 10%. The calorific value of the remaining sludge after well dehydration treatment increased to 8954kJ / kg, an increase of 41.1%.

[0019] (2) Add sodium carbonate and permethylferrocene in proportion to the excess sludge obtained by conditioning and drying, and stir evenly, and then stand still for 8 hours to obtain a combustion accelerant. Wherein, the mass percentages of excess sludge, sodium carbonate and permethyl ferrocene are 45%, 20% and 35% respectively.

[0020] Adding 18kg of the above-mentioned combustion accelerant to every 1 ton of coal increases the temperature of the inner flame by 10%, and the Ringelmann blackness of the flue gas is less than 0.8.

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Abstract

The invention discloses a method for promoting coal combustion and belongs to the technical field of combustion. The method comprises: subjecting residual sludge to dewatering, including bamboo powder mixing, plate-frame press filtering and dewatering; thus, sludge cake water content is reduced, and sludge combustion performance is enhanced; in combination with sodium carbonate and bis(pentamethylcyclopentadienyl)iron, a new idea for treating residual sludge is provided, coal combustion efficiency is also enhanced, and coal consumption can be decreased by about 3% under same power generation.

Description

technical field [0001] The invention relates to a method for promoting coal combustion, which belongs to the technical field of combustion. Background technique [0002] In the daily production process of thermal power plants, it is inevitable to burn a large amount of coal. In order to improve coal combustion efficiency, reduce pollutant emissions, and reduce coking, etc., some combustion accelerants are usually added to coal combustion to improve coal combustion. Most of the coal-burning combustion-supporting agents in the prior art have a single component and a single function, and are difficult to mix evenly. During use, they need to be added in separate samples, resulting in cumbersome procedures and failing to achieve the expected combustion-supporting effect. [0003] Sludge is the main by-product in the process of biological sewage treatment. In 2003, the output of dewatered sludge in urban sewage plants was about 1.3 million tons, and it was increasing at a rate of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10
CPCC10L9/10
Inventor 顾翼中冷雪冬徐斌
Owner CHANGZHOU SOUTHEAST THERMAL POWER CO LTD